Kinase inhibitors are a class of drugs designed to block the action of specific enzymes called kinases. These enzymes play a crucial role in various cellular processes, including cell growth, division, and survival. By inhibiting kinases, these drugs can help slow down or stop the growth of cancer cells and other diseases where abnormal kinase activity is present. These inhibitors are often used in targeted therapies for certain types of cancer, such as leukemia and breast cancer. They can be more effective and have fewer side effects compared to traditional chemotherapy, as they specifically target the pathways involved in disease progression.